Rats and people may rely on "metamemory" in a variety of different ways, scientists say. For a rat, it's likely about knowing whether you remember that predator in the distance; for people, knowing what we don't know helps us navigate social interactions.
Researchers find that dementia patients who engage in activities such as gathering photographs and talking about family see improvements in their quality of life and are less agitated.
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A colored magnetic resonance imaging (MRI) scans of the brain of a 76-year-old patient with dementia shows the brain has atrophied and the dark brown fluid-filled spaces have become enlarged.
Education may help brains cope with cognitive decline, and treatments for high blood pressure and other health problems may decrease dementia risk.
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The Old Town Museum in Aarhus, Denmark has created a "House of Memories" that's an exact replica of a 1950s apartment. It's intended for Alzheimer's patients, whose memories may be triggered by the sights, sounds and smells from the period, researchers say.
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Hiroyuki Yamamoto, a crossing guard in Matsudo, Japan, has been trained in how to recognize and gently approach people who are wandering, or have other signs of dementia, in ways that won't frighten them.
Parkinson's disease, smoking, certain head injuries and even normal aging can influence our sense of smell. But certain patterns of loss in the ability to identify odors seem pronounced in Alzheimer's, researchers say.
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